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1.
Adj: (Mus-sad-ist) A person who delights in tormenting former colleagues by abusing a privilege he has to use their services after he was fired.

adj. Mussadism; v.Mussadistic
Person 1: "That jerk called. He's complaining about the service."
Person 2: "If he hates it that much why does he keep calling?"
Person 1: "I don't know. I think he's just trying to get everybody fired."
Person 2: "He's just being a Mussadist."
by No Merit Badge February 25, 2010